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Antigonal Points

\begin{figure}\begin{center}\BoxedEPSF{AntigonalPoints.epsf}\end{center}\end{figure}

Given $\angle AXB+\angle AYB=\pi$ Radians in the above figure, then $X$ and $Y$ are said to be antigonal points with respect to $A$ and $B$.




© 1996-9 Eric W. Weisstein
1999-05-25